The problem of accounting and management of the human factor for ensuring the reliability, safety and viability of complex dynamic systems managed by a person under stressful conditions of activity is considered. Taking into account the individual characteristics of the human response to stress factors it simplifies optimization of activity and reduces the risks caused by the human factor.It is shown that without systematic study of stress state of the human operator the problem of stress resistance remains unsolved. It’s necessary to develop the methods and tools for evaluation of stress resistance and determining its “cost”. Aim: The aim of this research is to develop methods for monitoring, forecasting and evaluation of stress states of the human operator to improve manageability of the ergatic dynamic systems. Materials and Methods: For the study the methods of psychophysiological diagnostics are used. Measured the following electrophysical parameters of representative biologically active points and “stress points” – capacitance C and resistance R in the variable field. For more complete information about the functional state of the experimental subject the physiological characteristics of his body determined by two tests – Lüscher color test and Spielberger test. To assess the degree of influence of stress conditions on the dynamics of the functional state of the students we determined the number of correlations between the measured parameters. The correlation graphs of functional state were built. Results: The developed design method of “correlation graphs of functional state” allows to identify stress in humans and determine which is the main reason for its occurrence. The proposed method can be used to determine the “cost” of human adaptation to stressful operating conditions.